Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

stgreen Group Title

Hey,i want to make a circuit for alarm that rings out(for a duration) when AC 220v mains is comes to ON after a failure/pause.Suggest some...

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. JonTitus Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Connect a small plug-in power supply to your 220-volt line. Use DC output of power supply to drive a 555 timer circuit that can turn on an alarm for a preset period.

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.